Whenever you cast your first spell during each opponent's turn, look at the top card of that player's library, then exile it face down. You may play that card for as long as it remains exiled, and mana of any type can be spent to cast it.
Near Mint - £0.60
Lightly Played - £0.50
Moderately Played - £0.40
Heavily Played - £0.30
Damaged - £0.20
Near Mint Non English - £0.60
Lightly Played Non English - £0.50
Moderately Played Non English - £0.40
Heavily Played Non English - £0.30
Damaged Non English - £0.20